Note 7 - Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Accumulated other comprehensive income (loss), before tax		$ 2,927	$ 5,463	$ 4,493	$ 5,393
Accumulated other comprehensive income (loss), tax		(615)	(1,147)	(943)	(1,133)
Accumulated other comprehensive income (loss), net		2,312	4,316	3,550	4,260
Unrealized holding loss on available-for-sale securities arising during the period, before tax		(922)	278	(2,488)	348
Unrealized holding loss on available-for-sale securities arising during the period, tax		194	(59)	522	(73)
Unrealized holding loss on available-for-sale securities arising during the period, net		(728)	219	(1,966)	275
Amounts reclassified from accumulated other comprehensive income, before tax	[1],[2]	(2)	(8)	(2)	(8)
Amounts reclassified from accumulated other comprehensive income, tax	[1],[2]	0	2	0	2
Amounts reclassified from accumulated other comprehensive income, net	[1],[2]	(2)	(6)	(2)	(6)
Net current period other comprehensive loss, before tax		(924)	270	(2,490)	340
Net current period other comprehensive loss, tax		194	(57)	522	(71)
Other comprehensive income (loss)		(730)	213	(1,968)	269
Accumulated other comprehensive income (loss), before tax		2,003	5,733	2,003	5,733
Accumulated other comprehensive income (loss), tax		(421)	(1,204)	(421)	(1,204)
Accumulated other comprehensive income (loss), net		$ 1,582	$ 4,529	$ 1,582	$ 4,529

[1] Income tax expense

[2] Securities (gains) losses, net